#index3{
	opacity: 0;
}
.bg_size{
	background-size:100% 100%;
	background-repeat: no-repeat;
}
#index3 .main{
	position: relative;
}
#index3 .main .main_bg{
	width: 7.5rem;
	height: 13.34rem;
	background: url(../img/index3/背景.png);
	.bg_size;
}
#index3 .main .content{
	position: absolute;
	top:25%;
	left:26%;
}

#index3 .main .title{
	width: 3.61rem;
	height: 1.08rem;
	background: url(../img/index3/活动介绍.png);
	.bg_size;
}
#index3 .main .content ul{
	margin-top: 0.2rem;
	display: flex;
	flex-direction: column;
	list-style-type: none;
	font-size: 0.24rem;
}
#index3 .main .content ul li{
	width: 3.61rem;
	margin-bottom: 0.5rem;
	line-height: 0.45rem;
	transition: opacity 1s;
	opacity: 0;
}

#index3 .btn{
	width: 4.35rem;
	height: 2.02rem;
	position: absolute;
	background: url(../img/index2/我要猜灯谜.png);
	.bg_size;
	bottom:8%;
	left:-81%;
	transition: left 4s;
	z-index: 3;
}

#index3 .bottom{
	width: 7.5rem;
	height: 2.71rem;
	background: url(../img/index2/bottom.png);
	background-position: 0 100%;
	.bg_size;
	position: absolute;
	bottom:0;
	z-index: 2;
}